import { getSongsUrl, getLyric } from 'api/song';
import { ERR_OK } from 'api/config';
import { Base64 } from 'js-base64';

export default class Song {
  constructor({ id, mid, singer, name, album, duration, image, url }) {
    this.id = id;
    this.mid = mid;
    this.singer = singer;
    this.name = name;
    // 专辑
    this.album = album;
    // 歌曲播放时间
    this.duration = duration;
    this.image = image;
    this.url = url;
  }

  getLyric() {
    if (this.lyric) {
      return Promise.resolve(this.lyric);
    }

    return new Promise((resolve, reject) => {
      getLyric(this.mid).then(res => {
        if (res.retcode === ERR_OK) {
          this.lyric = Base64.decode(res.lyric);
          resolve(this.lyric);
        } else {
          reject(new Error('no lyric'));
        }
      });
    });
  }
}

export function createSong(musicData) {
  return new Song({
    id: musicData.songid,
    mid: musicData.songmid,
    singer: filterSinger(musicData.singer),
    name: musicData.songname,
    album: musicData.albumname,
    duration: musicData.interval,
    image: `https://y.gtimg.cn/music/photo_new/T002R300x300M000${
      musicData.albummid
    }.jpg?max_age=2592000`,
    url: musicData.url
  });
}

export function filterSinger(singer) {
  let ret = [];
  if (!singer) {
    return '';
  }
  singer.forEach(s => {
    ret.push(s.name);
  });
  return ret.join('/');
}

export function isValidMusic(musicData) {
  return (
    musicData.songid &&
    musicData.albummid &&
    (!musicData.pay || musicData.pay.payalbumprice === 0)
  );
}

export function processSongsUrl(songs) {
  if (!songs.length) {
    return Promise.resolve(songs);
  }
  return getSongsUrl(songs).then(purlMap => {
    songs = songs.filter(song => {
      const purl = purlMap[song.mid];
      if (purl) {
        song.url =
          purl.indexOf('http') === -1
            ? `http://dl.stream.qqmusic.qq.com/${purl}`
            : purl;
        return true;
      }
      return false;
    });
    return songs;
  });
}
